We agree that terms such as 'full swapper', soft swapper', 'watcher', etc are better used as indicators of chosen activity within the main category of 'Swinger'. So -- our answer to the OP is "Why Yes..we are"
In our society we seem to have a need for wrapping things up into neat, easy to handle bundles. We are much more comfortable with definative handles for everything..including things that by their very nature are difficult to pin down - but there is truth to the fact that we gotta call it something...and "That thing we do" is kinda clumsy!
In our opinion, swinging started out (and remains) as a couple-based activity - kind of a loophole for those who saw monogamy as an emotional concept instead of a sexual one. Singles got involved because in theory, 1 person is easier to add to the equation than 2 is. Most couples who have spent any time in the Lifestyle know that that theory isn't necessarily true. While admittedly we havn't been single for over 25 years, we havn't seen anything to lead us to belive that singles today are doing anything we didn't do. They aren't 'swinging'..they are just doing one of the things that single people do - having non-committal sex with different people they are attracted to. Generally, our society feels that if one is going to be promiscuous, the time to do it is when they are single. The only probable advantages in the 'swinging' lifestyle for singles are an additional emphasis on NSA and possibly reducing the logistics involved.
Our definition of 'swinging' is when a committed couple decides to physically involve others in their sex life to varying degrees. This is where we tend to disagree with how many define 'swinging'. We don't consider what your level of activity is as the determining factor in whether or not you are a 'swinger'. If the starting point is accepted societal sexual norms, to us it becomes rather simple. The accepted societal norm for sexual activity between a couple is behind closed doors and only involving said couple. We totally disagree with statements such as,"Soft-swappers aren't swingers" or "Folks into Watch-us-watch-you aren't really swingers". We even consider those who enjoy going to a club and simply soaking up the 'sexual vibe' and then going home and screwing each other into a coma to be 'swingers'. Our response to those who try to designate who the 'real swingers' are is to point out how it happens to work out that the only 'real swingers' are those whose level of activity happens to be the same as theirs.
Although there are constants within the 'swinging' culture, 'swinging' activity or style is by no means a static thing... nor should it be. People who start out as watchers, can decide to get into soft-swap. People who start out as soft-swappers can decide to full-swap. And yes, people who have been pretty much anything-goes-as-long-as-it-doesn't-result-in-defibrillator-use can decide to dial it back to just watching.. and it doesn't mean that they have to turn in their 'swingers' card!
As a side note, we are often suprised at how many people misconstrue and therefore bristle at the term 'Lifestyle'. Many see it as meaning something that dominates one's activities, incorrectly seeing the inference as being that they aren't interested in anything other than things sexual and the pursuit of same. Personally, we see the term 'Lifestyler' as interchangeable with 'swinger' for most applications.